Hi guys! Is there a way on Android to convert to an emoji the following code convention: "😒omething:"? Couldn't find the answer.

Anyone know how do I fix this? I'm receiving data in the detail activity using retrofit request, & send that data to the 4 tabs in my viewpager with View Model Now when the Activity loads, it has to also load the viewpager along with the first fragment which is displayed in the start. But problem is, making the request call & get the data, pass it to viewmodel, get data from the viewmodel takes some time I guess. Until then, the first fragment is already loaded without the items in my recyclerview. How do I automatically refresh the first fragment in the viewpager when my data has been fetched?

Hello guys. I have a problem with my local room database. Domain model

@Entity(tableName = "students")
data class Student(
    @PrimaryKey(autoGenerate = true)
    val id: Int? = null,
    var studentName: String,
    val studentId: String,
    var purchaseDate: String,
    val comment: String
)

DAO

@Dao
interface StudentDao {
    @Insert(onConflict = OnConflictStrategy.REPLACE)
    fun upsert(student: List<Student>)

    @Query("select * from students")
    fun getStudents(): LiveData<List<Student>>
}

Repository methods for upserting and getting List of Students

private fun persistFetchedStudents(fetchedStudents: StudentsResponse) {
    GlobalScope.launch(<http://Dispatchers.IO|Dispatchers.IO>) {
        Log.i("StudentRepositoryImpl", "Called from persistFetchedStudents: fetchedStudents.students.size = " + fetchedStudents.students.size)
        studentsDao.upsert(fetchedStudents.students)
    }
}

Log -> fetchedStudents.students.size = 140

private fun isFetchStudentNeeded(): Boolean {
    Log.i("StudentRepositoryImpl", "Called from isFetchStudentNeeded: studentsDao.getStudents().value = " + studentsDao.getStudents().value)
    return studentsDao.getStudents().value.isNullOrEmpty()
}

Log -> studentsDao.getStudents().value = null Is there anything I'm doing wrong? I can't see any issue myself. Thanks for any help 🙂

Hello everyone, Can you guys help me to find the solution of this problem: https://stackoverflow.com/questions/59009872/how-to-rename-the-key-of-a-json-response-dynamically-in-retrofit2-android Sorry for providing external link, but I really got stuck at this.

What is now the preferred way to do view binding? Kotlin Android Extensions still or?

Hi! Does it make sense to do

lifecycleScope.launch { }

in a

LifecycleService

when handling intents, or will it leak?

It seems like

runBlocking {}

isn't possible anymore, since you can't use the

lifecycleScope

with it...

In mutableLiveData<Int> , i am pushing USER_NOT_LOGGED_IN (==4) value in the starting of app from sharedpref. Still even these lines are executed, (I tested it by debugging), I am getting the livedata value 1. What is I am missing here?

Hello everyone, has anyone of you tried to use an inline class with Room database? I mean to use such inline class as an entity property but seems to be not working. It is described here https://stackoverflow.com/questions/58203953/room-database-with-kotlin-inline-class-as-an-entity-field

I'm moving away from using KotterKnife in my apps, since support and development was withdrawn a while ago. With ViewBinding still in Canary, what alternatives are you using, what are your recommendations?

Hello. I'm trying to use com.shopify.livedataktx.MutableLiveDataKtx to avoid the invasion of nullables and !! in kotlin code using ViewModel. How do you make a two-way binding with that kind of MutableLiveDataKtx?

I have a ProductDao interface class which implemented(?) by ProductDatabase. Maybe I should not say implemented(?), because it is not using the

implements

word. 1. Why the ProductDatabase can use

abstract

to initialize

interface

class?

abstract fun productDao(): ProductDao

2. What does the line of code means and trying to do?

@Database(entities = [Product::class], version = 1)
abstract class ProductDatabase : RoomDatabase() {
    abstract fun productDao(): ProductDao
}

@Dao
interface ProductDao {
    @Insert
    fun insert(product: Product)

    @Update
    fun update(product: Product)

    @Delete
    fun delete(product: Product)

    @Query("SELECT * FROM products")
    fun all(): LiveData<Array<Product>>

    @Query("SELECT * FROM products WHERE id = :id")
    fun get(id: Int): Product
}

If there any difference between

Java::class.java

and

Java::class

? Why sometime I need to passing the first option as a parameter but sometime I need to pass the second option?

Hello everyone, I wanted a solution to a certain problem. I am using a query to get the count of items with Room. I am using a suspend function with return an Int and in my repository class a suspend function which returns an int and when it comes to the view model class I don’t know how to get the return value from the suspend function without using runBlocking. I want to update the fragment when the app starts and before I navigate to the fragment.

I am facing a weird issue with Kotlin synthetic on Android, at

onActivityCreated

I have a field

reference_field.addTextChangedListener()

and then I navigate to a different screen (Fragment), however when I navigate back the listener no longer works and I think it has something to do with how Kotlin Android Extensions use cached views, on the other hand if I replace

reference_field.addTextChangedListener()

with

view?.findViewById<EditText>(R.id.reference_field)?.addTextChangedListener()

then navigate to a different screen and return to the previous screen the listener does work as intended. Perhaps when the view gets destroyed and recreated Kotlin synthetic is referring to a cached reference which no longer exists 🤔. Has anyone experienced this before?

I just updated to Kotlin 1.3.60 and when I try and build my project I get

Unable to load class 'kotlin.coroutines.Continuation'

on the task

:app:kaptGenerateStubsDevDebugKotlin

When I revert back to kotlin 1.3.50, it builds fine and everything works. Is there anything about 1.3.60 that might be causing this to happen?

Hello guys. Could someone tell how can I update kotlin plugin to 1.3.61 in Android Studio 4.0 Preview ? The message in preferences says “A new version is found but not verified”

I'm receiving

java.lang.AbstractMethodError: abstract method "void android.os.Parcelable.writeToParcel(android.os.Parcel, int)"

when putting the app in background, after saving a parcelable (using

Parcelize

) in

onSaveInstanceState

:

override fun onSaveInstanceState(outState: Bundle) {
    outState.putParcelable("test", Test())
    super.onSaveInstanceState(outState)
}

@Parcelize
data class Test(val test: String = "test"): Parcelable

It does not occur on configuration changes though. I'm using AS 4.0 Canary 4, with kotlin

1.3.60-eap-25

. Any idea of what am I doing wrong here?

Kotlin has a number of Android Extensions and one of them is that by referencing the ID of the view findViewById method is not necessary. And it is actually using cache so when you access that same view it is taken from cache. This works for Activity and Fragment classes, but when referencing a view by its ID from a custom class such as ViewHolder there is no cache and for every view in RecyclerView findViewById is called, so in that case I need to implement LayoutContainer interface on that class. So my question is, is this implementation still necessary in late 2019?

I’m trying to send data from an android service to an activity. I would usually do this with a broadcast receiver, but I was wondering if this was something I could use a Coroutine channel for and how would that work?

Hello everyone. I published this article that talks the guide to app architecture provided by Google, and how using it without extra care might lead to ViewModels being leaked. I'd appreciate if you could take some minutes to read it and give me some feedback. Thanks :) https://cheesecakelabs.com/blog/android-architecture-components-viewmodel-leak/?utm_source=linkedin&amp;utm_medium=post&amp;utm_campaign=blogpost-viewmodel

Can any one help how can I send a request in parallel using coroutines for example I am sending a list of images to the server in parallel or sequentially

❓ Kotlin Test not integrated with Android Studio - expected? When defining Unit Tests using only

kotlin.test

classes; Android Studio doesn't provide the same IDE integration as when using JUnit classes. Specifically: Right-click execution of test classes & individual tests, and capturing the results of the tests in the IDE UI. Is this expected? Seems like a surprising omission.

Is view-binding available in studio 4.0 canary? I can't get my gradle to synchronize after adding it.

Hi Guys, I am facing an issue while writing the data (Append the data) into raw (demofile.txt) folder. I am able to read the data but the I can’t append the data. My Reading functionality is looking like this from raw folder

fileContent = readFileFromRawDirectory(R.raw.demoFile) . ---> This is the file inside the /raw folder

private fun readFileFromRawDirectory(resourceId: Int): String {
        val iStream: InputStream = context?.resources.openRawResource(resourceId)
        var byteStream: ByteArrayOutputStream? = null
        try {
            val buffer = ByteArray(iStream.available())
            iStream.read(buffer)
            byteStream = ByteArrayOutputStream()
            byteStream.write(buffer)
            byteStream.close()
            iStream.close()
        } catch (e: IOException) {
            e.printStackTrace()
        }
        return byteStream.toString()
    }

Now I want to add the data inside the same demoFile.txt This below code is for writing the string inside the demoFile.txt

private fun writeDataIntoFile(searchText: String) {
        val file = context?.filesDir?.absolutePath + "/demoFile.txt"
        try {
            val fileout: FileOutputStream? = context?.openFileOutput(file, MODE_PRIVATE)
            val outputWriter = OutputStreamWriter(fileout)
            outputWriter.write(searchText)
            outputWriter.close()
            fileout?.close()
        } catch (e: Exception) {
            e.printStackTrace()
        }
    }

Anyone know how to keep kotlin.ws.kts within an Android project ? I'd like to keep my kotlin script within my android studio project so that others can use it without installing extras. I also don't know how to use dependencies within the kotlin script if it needs to be run alone (for example gson; so potentially question 2) Is anyone familiar with this ?

Is there any information out there on how Android plugin version in IntelliJ maps to Android Studio version? For example, what Android Studio version does Android plugin in IntelliJ 2019.3 map to?

Anyone know how to create a flavor config using gradle.kts? I've found this medium articled(link below) that does something similar but it isn's in .kts...https://medium.com/stepstone-tech/modularizing-your-flavored-android-project-5db75c59fb0d

Any idea why my app crashes when calling

fetchHeartbeat()

in my

MapsActivity.kt